Complications and Lumps After Penile Filler Injection: What Is Normal, What Is Not and What to Do

What is normal in the first few days?

Swelling of the penis, a feeling of tightness and tenderness are an expected part of recovery. The tissue reacts to the injection itself, not only to the filler that stays in place, so girth in the first days is larger than the stable result. A full timeline is on the page what happens day by day.

Bruising, meaning a dark or bluish patch on the skin, was reported in 1.3% of patients in a series of 230, usually between the second and fifth day, and it resolved on its own. The researchers stress the importance of reassuring the patient, because it looks alarming². The main cause is puncture of a small blood vessel. Anticoagulants and blood thinners raise the risk, so they should be reported before the injection².

A useful rule of thumb: a sign that improves from hour to hour and from one day to the next is usually part of the process. A sign that gets worse is a reason to get in touch.

Which complications are reported in the literature?

The complications reported for hyaluronic acid in the penis are lumps, filler migration, bruising, infection, swelling and narrowing of the foreskin, asymmetry, and a bluish tint of the skin over the filler. A recent meta-analysis of 23 studies and 2,620 participants found a pooled complication rate of about 14.9% across all methods, and about 9.0% for hyaluronic acid, the numerically lowest value. The comparisons are indirect, because no trial has compared the materials head to head, and the evidence for permanent materials is of very low quality³.

A summary urology review estimates that with conservative injection following a set method the complication rate is low, while without training, in large volumes and without a method, a poor result, pain and swelling are to be expected¹. This explains why the choice of who injects matters so much. Details on the page how to choose a safe doctor (Hebrew).

If you are looking for the broader picture of hyaluronic acid complications elsewhere in the body, you can read about filler complications (Hebrew).

Lumps: why do they form and when do they appear?

Lumps form when the filler collects in one spot instead of spreading evenly, and they are usually painless. In the series of 230 patients, lumps appeared in 2.2%, usually about two weeks after the injection. Lumps that did not respond to massage within one to two weeks persisted, and according to the researchers they were linked to injecting too quickly, which did not spread the filler evenly². A urology review adds that lumps usually appear after about two weeks, and that injecting too superficially can cause a bluish tint known as the Tyndall effect¹.

A separate type of lump, which may be inflammatory, is called a delayed inflammatory reaction. In the face, a systematic review of 242 studies estimated it to be rare: about one event per 2,000 patients per year. It can appear from about two weeks to years after the injection, shows up as a lump, redness and swelling, and is treated by dissolving the filler, with steroids or with antibiotics. These are facial data; there are no comparable data for the penis⁶.

How are lumps treated?

Treatment escalates in steps: early massage and warmth, then dissolving with an enzyme, and only as a last resort surgery.

• Massage and warmth. Mainly effective when started within the first one or two weeks after the lump appears. A doctor shows you how and where¹².
• Dissolving with an enzyme. If the filler is hyaluronic acid, a small, measured amount of enzyme can break down a lump. The effect is noticeable after a few days, and sometimes more than one injection is needed. You can also decide to smooth the area by adding filler, if you want to preserve the girth¹². Three notes: first confirm which material was injected, make sure there is no infection, and take an allergy to bee stings into account¹. More about the enzyme on the page reversibility (Hebrew).
• Surgery. The recommendation rests on clinical experience and professional opinion, not on controlled studies, and it is reserved for large lumps (over one centimeter), lumps that did not respond to treatment, or when the patient does not want the enzyme. It also removes filler that it would have been preferable to keep¹².
• Assessment at an examination. Before any treatment, the doctor establishes whether the lump is filler, a fluid collection, an infection or another material. Not every lump is hyaluronic acid, and if the enzyme is injected into something else the treatment will not help¹.

What is not known: there are no reported data on the success rate of dissolving filler in the penis. A small case series of four patients described successful use of the enzyme to correct asymmetry, to treat side effects and to prepare for a repeat injection⁴.

What about infection?

Infection after a hyaluronic acid injection in the penis is rare in the published series, around one percent, but it is a complication that should be recognized early. In a series of 230 patients, infection was recorded in 0.9%. Both were diabetic, and both had sexual intercourse one to two months after the injection. The symptoms were local warmth, redness and sudden swelling, and treatment included drainage and intravenous antibiotics. Both recovered². The urology review recommends sterile technique, and avoiding sexual contact for a month or longer, because it may introduce bacteria and disturb the healing area¹. For this reason, men at higher risk, for example with diabetes or a weakened immune system, receive special attention¹².

A single case report documents a severe, late, life-threatening infection two months after an injection at a cosmetic clinic and a day or two after unprotected sex. This is an exceptional event and says nothing about how common it is, but it explains why fever is a sign you should not wait on⁷.

Other complications: foreskin swelling, asymmetry, sensation

Persistent swelling of the foreskin and asymmetry are usually related to the injection and to migration of the filler. In one series, all 21 patients with swelling had excess foreskin and had not been circumcised or had earlier foreskin surgery, and the swelling eased with elastic bandaging. The researchers suggested considering foreskin surgery before the injection². The urology review adds that any filler may migrate into the foreskin, that foreskin surgery before the injection does not prevent lumps and asymmetry, and that migration can be treated with the enzyme or with surgery¹.

On erections and sensation: the controlled trials reported no harm to erections, but the ISSM notes reports of erectile and sensory problems, as well as vascular reactions and severe hypersensitivity, and classifies some approaches as experimental⁵. It is fair to say the risk is low according to the available data, but not that there is no risk.

Necrosis and foreign-body reactions: when are they relevant?

Necrosis, granulomas and foreign-body reactions are documented mainly after permanent or unknown materials, and after self-injection. In a series of 35 patients who had a foreign substance injected, 91% needed surgery, and complications included necrosis (three patients) and damage that appeared up to 20 years after the injection⁸. These are substances such as silicone and paraffin, which must not be injected, not medical-grade hyaluronic acid¹⁸. If you have been injected with a material you cannot identify, it is advisable to see a urologist even if you have no symptoms. Details on the page how to choose a safe doctor (Hebrew).

Poly-L-lactic acid (PLA) filler does not respond to the enzyme, and lumps from it may be inflammatory and require steroids or excision¹. See fat grafting and other methods (Hebrew).

Vascular occlusion caused by filler is a known complication in the face. A 2026 review notes that it affects about 0.015% of patients, and that early recognition and prompt dissolving with the enzyme limit tissue damage. This figure comes from the face, not the penis⁹. The urology literature on the penis has not reported such cases with hyaluronic acid, but that is no reason to ignore the signs¹. Severe pain or a dark change in skin color are therefore reasons to seek help immediately.

When should you contact a doctor, and when urgently?

Seek help the same day for severe pain that gets worse, fever, redness or swelling that spreads, pus-like discharge, a dark or blue-gray change in color in the area, or difficulty passing urine. In any of these situations, if you cannot reach the doctor who performed the injection, go to an emergency department.

Get in touch within the next few days, without panic, for:

• A lump that persists beyond two weeks or appears later
• Asymmetry that bothers you
• Foreskin swelling that does not go down
• A change in erections or sensation

For privacy you can make first contact by message, and if you were injected elsewhere you are welcome to come for an assessment without being a regular patient. What is examined and how corrections are made is explained on the page correcting girth enhancement done elsewhere (Hebrew).

How can the risk be reduced?

Three main factors: who injects, what is injected and how.

1. The injector. Injection by a doctor only, with specific training for this area, available follow-up and a way to get in touch between visits. Most of the serious complications in published series followed injection by non-physicians or with unknown material⁸. The list of questions to ask is on the choosing a doctor page (Hebrew).
2. The material. Hyaluronic acid with a known product name and source, which can be broken down with the enzyme. Not silicone, paraffin or oils¹⁸.
3. The technique. According to the reviews: small amounts at a time over several sessions, slow and evenly spread injection, a fine needle, the correct anatomical layer, massage after the injection, and sterile technique¹².

Before the injection it is also important to tell the doctor about anticoagulants, diabetes or a weakened immune system, a foreskin problem, an infection or wound in the area, and allergies, and to decide whether any issue needs treatment first. An international consensus panel stresses that a thorough assessment and a discussion of the risks are mandatory before any such treatment¹⁰. One more point: anxiety about size is not the same problem as body dysmorphic disorder, and telling them apart is part of the consultation, as explained on the page hyaluronic acid girth enhancement. An overview of the risks in their broader context is on the page is penile girth enhancement safe (Hebrew).

Can I get advice?

A consultation with Dr. Dana Buchbut is a discreet conversation in which you go over your medical history, the risks and what is done if something does not go as expected. With hyaluronic acid girth enhancement, the filler can be broken down with the enzyme by medical decision, as explained on the page reversibility (Hebrew). If you are dealing with a lump or another problem after an injection, even one done elsewhere, you can send a discreet message, in English if you prefer, and find out what the next step is. If there are emergency signs (severe pain, fever, a dark change in color), do not wait for a reply: contact the doctor who injected you or go to an emergency department. The clinic: Beit HaRofim, 11 HaBarzel St., Building A, 7th floor, Unit 16A, Ramat HaHayal, Tel Aviv, Israel. Phone and WhatsApp: +972-54-556-8871.

The information on this page does not replace a medical diagnosis and advice. For any unusual symptom, contact a doctor.

The information on this page is general and for education only. It does not replace an examination, diagnosis or personal medical advice. A decision about treatment is made only after an examination.